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Full Discussion: Unique batch and sequence creation
Top Forums Shell Programming and Scripting Unique batch and sequence creation Post 302283797 by cfajohnson on Wednesday 4th of February 2009 04:32:31 AM
Old 02-04-2009
Quote:
Originally Posted by jim mcnamara
Code:
sequence()
{
   if [[ -w sequence.dat ]] ; then
    a=$(<sequence.dat)


A read command will be much faster than command substitution in all shells except ksh93:

Code:
read a < sequence.dat

Quote:
Code:
   a=$(( $a + 1 ))
    echo $a > sequence.dat
    echo $a
   else 
     echo "Error sequence not setup" > 2
     exit 1
   fi

}

 

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LEARN ABOUT MOJAVE

tcl_backslash

Tcl_Backslash(3)					      Tcl Library Procedures						  Tcl_Backslash(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_Backslash - parse a backslash sequence

SYNOPSIS

       #include <tcl.h>

       char
       Tcl_Backslash(src, countPtr)

ARGUMENTS

       char *src (in)		    Pointer to a string starting with a backslash.

       int *countPtr (out)	    If countPtr is not NULL, *countPtr gets filled in with number of characters in the backslash sequence, includ-
				    ing the backslash character.
_________________________________________________________________

DESCRIPTION

       The use of Tcl_Backslash is deprecated in favor of Tcl_UtfBackslash.

       This is a utility procedure provided for backwards compatibility with non-internationalized Tcl extensions.  It parses a backslash sequence
       and returns the low byte of the Unicode character corresponding to the sequence.  Tcl_Backslash modifies *countPtr to contain the number of
       characters in the backslash sequence.

       See the Tcl manual entry for information on the valid backslash sequences.  All of the sequences described in the Tcl manual entry are sup-
       ported by Tcl_Backslash.

SEE ALSO

       Tcl(n), Tcl_UtfBackslash(3)

KEYWORDS

       backslash, parse

Tcl									8.1							  Tcl_Backslash(3)
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